Claude Code now reads AGENTS.md if there is no Claude.md
Summary
This article is Claude Code’s release notes, highlighting the addition of AGENTS.md when CLAUDE.md is absent, plus a long list of bug fixes and enhancements across the Claude Code toolchain. It covers version 2.1.277 (Sept 18, 2026) and earlier, detailing improvements to debugging, performance, and cross-platform behavior (Bedrock/Vertex/Foundry), plus new plugins, MCP, and cross-session features.